> Many web recommendations include doing this as root:> # yum install readline-devel

Yes, the reason I mentioned the readline library filenames wasso you could see if you have readline installed. Eg, via locate libreadline.so or via find /lib -name 'libreadline*'which on my system both show /lib/x86_64-linux-gnu/libreadline.so.6and /lib/x86_64-linux-gnu/libreadline.so.6.2 .

Also, after installing readline, see if yum install pari-devel or yum update pari-devel will work. But if you are compiling pari-gp from source, you need to have readline installed before you do the ./configure step. Since your gp shows "readline not compiled in", readline might have not been installed when you said ./configure. Perhaps look at the dates on your gp executable,the pari-gp make file, and your libreadline.so files, via ls -l.Notes, the dates could look ok, but if no ldconfig occurred thelibrary cache wouldn't have been updated. I'd expect make filesfor library routines to run ldconfig, however, so that's unlikely.